For me, my daughter is my bestest friend.

对我来说，我的女儿是我最好最好的朋友。

You're the bestest bud two friends could ever have.

你们两个是我永远的好兄弟。

Three of your oldest and bestest friends.

三个最熟识最要好的朋友。

I have her bestest friend in the whole wide world.

我有她全世界朋友的的名字。